Learn how to format an email or hard copy letter with an attached document and review our examples to use as a guide. Mention the attached file in the email body.Attach an appropriate file format. Sending documents is an essential skill in the professional word. Any of the following are acceptable: Please see my completed application form. Please find attached my completed application form. This is a free cover letter template for submitting documents. Free Download and customize it according to the sample text below. You need on your computer an application that can read and write using the form's file format. Eg, If the form is in .